# db2_get_option

(PECL ibm_db2 >= 1.6.0)

db2_get_option — Retrieves an option value for a statement resource or a connection resource

### Beschreibung

db2_get_option(resource `$resource`, string `$option`): string|false

Retrieves the value of a specified option value for a statement resource or a connection resource.

### Parameter-Liste

`resource`
  A valid statement resource as returned from db2_prepare() or a valid connection resource as returned from db2_connect() or db2_pconnect().
`option`

  A valid statement or connection options. The following new options are available as of ibm_db2 version 1.6.0. They provide useful tracking information that can be set during execution with db2_get_option().

  > Hinweis: Prior versions of ibm_db2 do not support these new options. When the value in each option is being set, some servers might not handle the entire length provided and might truncate the value. To ensure that the data specified in each option is converted correctly when transmitted to a host system, use only the characters A through Z, 0 through 9, and the underscore (_) or period (.).

  `userid`

    `SQL_ATTR_INFO_USERID` - A pointer to a null-terminated character string used to identify the client user ID sent to the host database server when using DB2 Connect.

    > Hinweis: DB2 for z/OS and OS/390 servers support up to a length of 16 characters. This user-id is not to be confused with the authentication user-id, it is for identification purposes only and is not used for any authorization.

  `acctstr`

    `SQL_ATTR_INFO_ACCTSTR` - A pointer to a null-terminated character string used to identify the client accounting string sent to the host database server when using DB2 Connect.

    > Hinweis: DB2 for z/OS and OS/390 servers support up to a length of 200 characters.

  `applname`

    `SQL_ATTR_INFO_APPLNAME` - A pointer to a null-terminated character string used to identify the client application name sent to the host database server when using DB2 Connect.

    > Hinweis: DB2 for z/OS and OS/390 servers support up to a length of 32 characters.

  `wrkstnname`

    `SQL_ATTR_INFO_WRKSTNNAME` - A pointer to a null-terminated character string used to identify the client workstation name sent to the host database server when using DB2 Connect.

    > Hinweis: DB2 for z/OS and OS/390 servers support up to a length of 18 characters.

The following table specifies which options are compatible with the available resource types:

Resource-Parameter Matrix
Key | Value | Resource Type
--- | --- | ---
|  | Connection | Statement | Result Set
userid | `SQL_ATTR_INFO_USERID` | X | X | -
acctstr | `SQL_ATTR_INFO_ACCTSTR` | X | X | -
applname | `SQL_ATTR_INFO_APPLNAME` | X | X | -
wrkstnname | `SQL_ATTR_INFO_WRKSTNNAME` | X | X | -

### Rückgabewerte

Returns the current setting of the connection attribute provided on success Bei einem Fehler wird `false` zurückgegeben..

### Beispiele

Beispiel #1 Setting and retrieving parameters through a connection resource

`<?php
/* Database Connection Parameters */
$database = 'SAMPLE';
$user = 'db2inst1';
$password = 'ibmdb2';
/* Obtain Connection Resource */
$conn = db2_connect($database, $user, $password);
echo "Client attributes passed through connection string:\n";
/* Create the associative options array with valid key-value pairs */
/* Assign the attributes through connection string */
/* Access the options specified */
$options1 = array('userid' => 'db2inst1');
$conn1 = db2_connect($database, $user, $password, $options1);
$val = db2_get_option($conn1, 'userid');
echo $val . "\n";
$options2 = array('acctstr' => 'account');
$conn2 = db2_connect($database, $user, $password, $options2);
$val = db2_get_option($conn2, 'acctstr');
echo $val . "\n";
$options3 = array('applname' => 'myapp');
$conn3 = db2_connect($database, $user, $password, $options3);
$val = db2_get_option($conn3, 'applname');
echo $val . "\n";
$options4 = array('wrkstnname' => 'workstation');
$conn4 = db2_connect($database, $user, $password, $options4);
$val = db2_get_option($conn4, 'wrkstnname');
echo $val . "\n";
echo "Client attributes passed post-connection:\n";
/* Create the associative options array with valid key-value pairs */
/* Assign the attributes after a connection is made */
/* Access the options specified */
$options5 = array('userid' => 'db2inst1');
$conn5 = db2_connect($database, $user, $password);
$rc = db2_set_option($conn5, $options5, 1);
$val = db2_get_option($conn5, 'userid');
echo $val . "\n";
$options6 = array('acctstr' => 'account');
$conn6 = db2_connect($database, $user, $password);
$rc = db2_set_option($conn6, $options6, 1);
$val = db2_get_option($conn6, 'acctstr');
echo $val . "\n";
$options7 = array('applname' => 'myapp');
$conn7 = db2_connect($database, $user, $password);
$rc = db2_set_option($conn7, $options7, 1);
$val = db2_get_option($conn7, 'applname');
echo $val . "\n";
$options8 = array('wrkstnname' => 'workstation');
$conn8 = db2_connect($database, $user, $password);
$rc = db2_set_option($conn8, $options8, 1);
$val = db2_get_option($conn8, 'wrkstnname');
echo $val . "\n";
?>`

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    Client attributes passed through connection string:
    db2inst1
    account
    myapp
    workstation
    Client attributes passed post-connection:
    db2inst1
    account
    myapp
    workstation

### Siehe auch

- db2_connect() - Returns a connection to a database
- db2_cursor_type() - Returns the cursor type used by a statement resource
- db2_exec() - Executes an SQL statement directly
- db2_set_option() - Set options for connection or statement resources
- db2_pconnect() - Returns a persistent connection to a database
- db2_prepare() - Prepares an SQL statement to be executed

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